This study examined whether the relationship between reward structure and team performance is contingent upon task dimension, team composition, and individual performance level. Seventy-five four-person teams engaged in a simulated interactive task in which reward structure was manipulated. A competitive structure enhanced one task dimension, speed, whereas a cooperative structure enhanced accuracy. Teams with extroverted and agreeable members performed better under the cooperative structure, whereas teams low on these orientations performed better under the competitive structure. Finally, reward structure had more impact on team members with low performance.The degree to which organizations should emphasize cooperation or competition among the members of work teams is an age-old controversy. Competitive systems embody equity norms and emphasize performance differences among team members, typically rewarding individuals with high performance and/or imposing sanctions on those with low performance. Therefore, some believe that competition promotes efficiency and innovation because it stimulates individuals to outperform each other by working faster, or "smarter," or cheaper, and the belief is that this activity will serve the long-term needs of their organization. Others believe that intrateam competition is destructive. In competing, individuals or subgroups place their own goals above those of the larger organization, and the gains achieved by one are often obtained at the expense of another. For this reason, some argue that the needs of the larger organization are better met by employing cooperative reward structures. Cooperative systems embody equality norms and emphasize group accomplishments. They emphasize minimizing distinctions among group members (that is, distinctions based on performance) because these distinctions may impede teamwork, information sharing, and helping.The inherent tension between competitive and cooperative reward structures has become particularly salient in contemporary organizations because many of these organizations are trying to make the transition from individual-based structures to team-based structures (Allred, Snow, & Miles, 1996). Some organizations that have transitioned into team-based structures over the last several years have left their reward structures unchanged. This lack of change resulted in a failure of teambased work to result in the supposed benefits (Hackman, 1998). Indeed, the consensus in the scientific literature regarding competitive and collaborative rewards structures is quite clear in its sup-